diff --git a/cratedb_toolkit/retention/strategy/delete.py b/cratedb_toolkit/retention/strategy/delete.py
index f096666e..46e86eac 100644
--- a/cratedb_toolkit/retention/strategy/delete.py
+++ b/cratedb_toolkit/retention/strategy/delete.py
@@ -10,6 +10,7 @@
 In CrateDB, tables for storing retention policies need to be created once manually.
 See the file setup/schema.sql in this repository.
 """
+
 import dataclasses
 import logging
 
diff --git a/cratedb_toolkit/retention/strategy/reallocate.py b/cratedb_toolkit/retention/strategy/reallocate.py
index fdd7c5ee..a8976a89 100644
--- a/cratedb_toolkit/retention/strategy/reallocate.py
+++ b/cratedb_toolkit/retention/strategy/reallocate.py
@@ -12,6 +12,7 @@
 - Tables for storing retention policies need to be created once manually in
   CrateDB. See the file setup/schema.sql in this repository.
 """
+
 import dataclasses
 import logging
 
diff --git a/cratedb_toolkit/retention/strategy/snapshot.py b/cratedb_toolkit/retention/strategy/snapshot.py
index 8626eed9..c538860c 100644
--- a/cratedb_toolkit/retention/strategy/snapshot.py
+++ b/cratedb_toolkit/retention/strategy/snapshot.py
@@ -10,6 +10,7 @@
 In CrateDB, tables for storing retention policies need to be created once manually.
 See the file setup/schema.sql in this repository.
 """
+
 import dataclasses
 import logging
 
diff --git a/cratedb_toolkit/wtf/recorder.py b/cratedb_toolkit/wtf/recorder.py
index 3c90d477..08cf5756 100644
--- a/cratedb_toolkit/wtf/recorder.py
+++ b/cratedb_toolkit/wtf/recorder.py
@@ -40,7 +40,8 @@ def record_once(self):
                 )
             )
             self.adapter.connection.execute(
-                sa.text(f"INSERT INTO {table} (info) VALUES (:info)"), {"info": sample.to_dict()["data"]}  # noqa: S608
+                sa.text(f"INSERT INTO {table} (info) VALUES (:info)"),  # noqa: S608
+                {"info": sample.to_dict()["data"]},
             )
 
     def record_forever(self):
diff --git a/examples/cloud_import.py b/examples/cloud_import.py
index 62df562b..45c6326a 100644
--- a/examples/cloud_import.py
+++ b/examples/cloud_import.py
@@ -32,6 +32,7 @@
     python examples/cloud_import.py e1e38d92-a650-48f1-8a70-8133f2d5c400
 
 """
+
 import logging
 import os
 import sys
diff --git a/examples/retention_edit.py b/examples/retention_edit.py
index d25d1630..bae7f267 100644
--- a/examples/retention_edit.py
+++ b/examples/retention_edit.py
@@ -27,6 +27,7 @@
     python examples/retention_edit.py crate://localhost:4200
 
 """
+
 import logging
 import os
 
diff --git a/examples/retention_retire_cutoff.py b/examples/retention_retire_cutoff.py
index 310b9539..f093636a 100644
--- a/examples/retention_retire_cutoff.py
+++ b/examples/retention_retire_cutoff.py
@@ -33,6 +33,7 @@
     python examples/retention_retire_cutoff.py crate://localhost:4200
 
 """
+
 import logging
 import os
 
diff --git a/pyproject.toml b/pyproject.toml
index 11d25051..479cb2bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -113,10 +113,10 @@ datasets = [
 ]
 develop = [
   "black[jupyter]<25",
-  "mypy==1.8.0",
+  "mypy<1.10",
   "poethepoet<0.26",
   "pyproject-fmt<1.8",
-  "ruff==0.3.4",
+  "ruff<0.4",
   "validate-pyproject<0.17",
 ]
 influxdb = [
@@ -215,7 +215,7 @@ markers = [
 [tool.ruff]
 line-length = 120
 
-select = [
+lint.select = [
   # Bandit
   "S",
   # Bugbear
@@ -243,7 +243,7 @@ select = [
   "RET",
 ]
 
-extend-ignore = [
+lint.extend-ignore = [
   # zip() without an explicit strict= parameter
   "B905",
   # df is a bad variable name. Be kinder to your future self.
@@ -261,7 +261,7 @@ extend-exclude = [
   "workbench.py",
 ]
 
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint.per-file-ignores]
 "tests/*" = ["S101"]  # Allow use of `assert`, and `print`.
 "examples/*" = ["T201"]  # Allow `print`
 "cratedb_toolkit/retention/cli.py" = ["T201"]  # Allow `print`
@@ -286,12 +286,13 @@ format = [
   { cmd = "black ." },
   # Configure Ruff not to auto-fix (remove!):
   # unused imports (F401), unused variables (F841), `print` statements (T201), and commented-out code (ERA001).
-  { cmd = "ruff --fix --ignore=ERA --ignore=F401 --ignore=F841 --ignore=T20 --ignore=ERA001 ." },
+  { cmd = "ruff format" },
+  { cmd = "ruff check --fix --ignore=ERA --ignore=F401 --ignore=F841 --ignore=T20 --ignore=ERA001 ." },
   { cmd = "pyproject-fmt --keep-full-version pyproject.toml" },
 ]
 
 lint = [
-  { cmd = "ruff ." },
+  { cmd = "ruff check ." },
   { cmd = "black --check ." },
   { cmd = "validate-pyproject pyproject.toml" },
   { cmd = "mypy" },